文档介绍：TPS54383, TPS54386
SLUS774B–AUGUST 2007–REVISED OCTOBER 2007
3-A DUAL NON-SYNCHRONOUS CONVERTER WITH INTEGRATED HIGH-SIDE MOSFET
1FEATURES CONTENTS
23• -V to 28-V Input Range Device Ratings 2
• Output Voltage Range V to 90% of Input Electrical Characteristics 3
Voltage Device Information 9
• Output Current Up to 3 A Application Information 12
• Two Fixed Switching Frequency Versions: Design Examples 32
– TPS54383: 300 kHz Additional References 44
– TPS54386: 600 kHz
• Three Selectable Levels of Overcurrent DESCRIPTION
Protection (Output 2) The TPS54383 and TPS54386 are dual output,
• -V % Voltage Reference non-synchronous buck converters capable of
supporting 3-A output applications that operate from a
• -ms Internal Soft Start
-V to 28-V input supply voltage, and require output
• Dual PWM Outputs 180° Out-of-Phase voltages between V and 90% of the input voltage.
•
Ratiometric or Sequential Startup Modes With an internally-determined operating frequency,
Selectable by a Single Pin soft start time, and control pensation, these
• 85-mΩ Internal High-Side MOSFETs converters provide many features with a minimum of
• Current Mode Control ponents. Channel 1 overcurrent
• protection is set at A, while Channel 2 overcurrent
pensation (See Page 16) protection level is selected by connecting a pin to
• Pulse-by-Pulse Overcurrent Protection ground, to BP, or left floating. The setting levels are
• Thermal Shutdown Protection at +148°C used to allow for scaling of ponents for
applications that do not need the full load capability of
• 14-Pin PowerPAD™ HTSSOP package
both outputs.
APPLICATIONS The outputs may be enabled independently, or may
• Set Top Box be configured to allow either ratiometric or sequential
• startup sequencing. Additionally, the two outputs may
Digital TV be powered from different sources.
• Power for DSP
• Consumer Electronics
VIN
TPS54383
1 PVDD1 PVDD2 14
2 BOOT1 BOOT2 1